Ok, when I said practical concerns aside, I obviously did not mean to have a personal chef at your disposal to acquire all ingredients that go into pellets and serve them fresh.
I'm surprised that no one said they'd let the parrot choose. I usually just serve one or the other but on the occasions I serve pellets and fresh veggies, 7/10 times she'll go for the pellets first. Looks to me like she's choosing pellets.
From a nutritional point of view, I don't think I could manage to find and feed everything the parrot needs so once again, I'd probably feel safer on all pellets than all fresh foods. I know I've left my parrot on all pellets when I was away on vacations and she did just fine. I know many parrots live on all pellets just fine. Heck, there are many parrots that reach old age on an all seed diet alone. So it can't be that bad. I'm starting to suspect that I've been over-emphasizing fresh foods on my parrot (used to be 50/50 pellets/fresh) when really she just seems to want her pellets. So now, lately, I've been mixing some pellets into her veggie dinner. It means more waste of veggies but better nutrition I suspect. I think I'm going to adjust her to about 70/30 pellets/other.
I've spoken to Jean Pattison extensively (who is breeding my Cape) and she told me a
real life story where she stopped feeding veggies to her breeder flock for a year and nothing but pellets and that their health and yield actually improved rather than worsened. She told me that if given the choice of feeding only pellets or only fresh, she thinks pellets are the more nutritional/safer bet. I used to feel guilty that Kili wasn't getting much or any fresh food when I was away on vacations and I just asked someone to feed her pellets cause it's easier. But now after my discussions with Jean, other parrot people, reading some articles, and my own observation of Kili's pellet preference, I think I'll just let her eat pellets when I'm away for a week without looking back. I am not ruling fresh foods out of her diet entirely but I am pretty sure that if it came down between fresh and pellets, I would go with just pellets.